diff --git a/tests/spec/end-to-end/story-optimized/expected_output.amp-story-optimized-lts.html b/tests/spec/end-to-end/story-optimized/expected_output.amp-story-optimized-lts.html
new file mode 100644
index 000000000..3256167b0
--- /dev/null
+++ b/tests/spec/end-to-end/story-optimized/expected_output.amp-story-optimized-lts.html
@@ -0,0 +1,35 @@
+
+
+
+
+
+
+
+ My Story
+
+
+
+
+
+
+ Hello World
+ This is the cover page of this story.
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/tests/spec/end-to-end/story-optimized/expected_output.amp-story-optimized.html b/tests/spec/end-to-end/story-optimized/expected_output.amp-story-optimized.html
new file mode 100644
index 000000000..ada105d9f
--- /dev/null
+++ b/tests/spec/end-to-end/story-optimized/expected_output.amp-story-optimized.html
@@ -0,0 +1,35 @@
+
+
+
+
+
+
+
+ My Story
+
+
+
+
+
+
+ Hello World
+ This is the cover page of this story.
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/tests/spec/end-to-end/story-optimized/input.html b/tests/spec/end-to-end/story-optimized/input.html
new file mode 100644
index 000000000..f9761d780
--- /dev/null
+++ b/tests/spec/end-to-end/story-optimized/input.html
@@ -0,0 +1,44 @@
+
+
+
+
+
+
+
+ My Story
+
+
+
+
+
+
+
+
+
+
+
+ Hello World
+ This is the cover page of this story.
+
+
+
+
+
+
diff --git a/tests/spec/transformers/experimental/AmpStoryCssTransformer/add_amp_story_dvh_polyfill_script/expected_output.html b/tests/spec/transformers/experimental/AmpStoryCssTransformer/add_amp_story_dvh_polyfill_script/expected_output.html
index 82baa75b9..2b0a34174 100644
--- a/tests/spec/transformers/experimental/AmpStoryCssTransformer/add_amp_story_dvh_polyfill_script/expected_output.html
+++ b/tests/spec/transformers/experimental/AmpStoryCssTransformer/add_amp_story_dvh_polyfill_script/expected_output.html
@@ -5,7 +5,7 @@
-
+
diff --git a/tests/spec/transformers/experimental/AmpStoryCssTransformer/add_amp_story_link_stylesheet_lts/expected_output.html b/tests/spec/transformers/experimental/AmpStoryCssTransformer/add_amp_story_link_stylesheet_lts/expected_output.html
deleted file mode 100644
index 602cd589e..000000000
--- a/tests/spec/transformers/experimental/AmpStoryCssTransformer/add_amp_story_link_stylesheet_lts/expected_output.html
+++ /dev/null
@@ -1,18 +0,0 @@
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
\ No newline at end of file
diff --git a/tests/spec/transformers/experimental/AmpStoryCssTransformer/add_amp_story_link_stylesheet_lts/input.html b/tests/spec/transformers/experimental/AmpStoryCssTransformer/add_amp_story_link_stylesheet_lts/input.html
deleted file mode 100644
index a5c67fa48..000000000
--- a/tests/spec/transformers/experimental/AmpStoryCssTransformer/add_amp_story_link_stylesheet_lts/input.html
+++ /dev/null
@@ -1,17 +0,0 @@
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
diff --git a/tests/spec/transformers/experimental/AmpStoryCssTransformer/modify_amp_custom_css/expected_output.html b/tests/spec/transformers/experimental/AmpStoryCssTransformer/modify_amp_custom_css/expected_output.html
index e704fbcb3..5e39c081a 100644
--- a/tests/spec/transformers/experimental/AmpStoryCssTransformer/modify_amp_custom_css/expected_output.html
+++ b/tests/spec/transformers/experimental/AmpStoryCssTransformer/modify_amp_custom_css/expected_output.html
@@ -14,7 +14,7 @@
foo {transform: translate3d(calc(-86 * var(--story-page-vmin)), 0, 0);}
foo {transform: translate3d(calc(-87 * var(--story-page-vmax)), 0, 0);}
-
+
diff --git a/tests/spec/transformers/valid/AutoExtensionImporter/amp-carousel/expected_output.html b/tests/spec/transformers/valid/AutoExtensionImporter/amp-carousel/expected_output.html
index c1b9af5fb..4ef355675 100644
--- a/tests/spec/transformers/valid/AutoExtensionImporter/amp-carousel/expected_output.html
+++ b/tests/spec/transformers/valid/AutoExtensionImporter/amp-carousel/expected_output.html
@@ -6,7 +6,7 @@
-
+
diff --git a/tests/spec/transformers/valid/AutoExtensionImporter/auto-imports-missing-extensions/expected_output.html b/tests/spec/transformers/valid/AutoExtensionImporter/auto-imports-missing-extensions/expected_output.html
index fd1bd849e..c82602d9c 100644
--- a/tests/spec/transformers/valid/AutoExtensionImporter/auto-imports-missing-extensions/expected_output.html
+++ b/tests/spec/transformers/valid/AutoExtensionImporter/auto-imports-missing-extensions/expected_output.html
@@ -6,7 +6,7 @@
-
+
+